Impulse-transmitter for selective systems.



G. BROWNA IMRULSE TRANSMITTER FOR SELECTIVE SYSTEMS.

APPLICATION FILED IULY'TT 1910.

Patented Oct. 1915.

2 SHELTS-SHEET 2.

m@ T im,

Y lli UNITED sTATEs PATENT oEEIoE.

GREGORY BROWN, OF BROOKLYN, NEW YORK. ASSIGNOR TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOS.

IMPULSE-TBANSMITTER FOB SELECTIVE SYSTEMS.

Appiicanu inea .nay 11. imo.

To all whom it may concern.'

Be it known that l, GREGonY BROWN. citi r'aen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful lmprovenient in Impulse-Transmitters for Selective Systems, of which the following is in full, clear, concise. and exact description. p

My invention relates to an impulse trans niitter for use in connection with party` line or like systems wherein there are a plurality of subscriber or way stations on the same line, each station being provided with a selector mechanism adapted in response to impulses set over the line to close a signaling circuit at that station; the number of impulses for calling the stations being dillerent for each particular selector.

My invention has for its object the provision of an impulse transmitter which will be compact, sure and quiet in its ipeiation, easily manufactured and one which can he easily and speedily adjusted to cause any particular selector on the line to operate its signal.

The impulse transmitter to which this inn vention relates comprises in general a clockwork mechanism in which energy is stored up hy the turning of a handle which winds a spiral spring. When the handle is released the spring revolves a shaft upon which is mounted a toothed wheel adapted to operate a springr contact tor interrupting circuit. An adjustable member is provided tor cov ering certain of the teeth in such a manner that the number of impulses sent over the line for signaling purposes can he easily varied thus enabling the station at which such an impulse transmitter is located to adjust the. apparatus to call any other party on the saine line.

In the drawings illustrating my inven tion: Figure l is a view in side elevation of the mechanism with a part of the camini);Y

.of a modilied form of'key. Fig. is a view in end elevation of the parts shown in {"ig. 5. Fig. 7 is a view of the inner end ot the modiied mechanism.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Serial No. 571,397.

The two mechanisms herein shown differ only in certain details hereinafter pointed out and the same reference numerals desig nate like parta, in the two arrangements nii-- less ntherwre specified.

ln said lrawinefsy 5 and 6 designate frame plate members secured together hy rods'l, 8 and l?. Supported in these frame plates 5 and 6 are shafts l0 and l1, the shai't l0 constituting a` driving and the shaft l1 the driven shaft of the mechanism. Loosely mounted upon the shaft l() is a gear wheel 1l adapted to he driven by a spiral spring 15 on said shaft. Said gear wheel 14 meshes with a pinion 1li on the shaft 11 which pinion is secured to a gear wheel li on said shaft ll, said gear wheel 17 being in mesh with a pinion 18 loosely mounted upon the shaft. 10 andr secured to a gear wheel 19. Said gear wheel lil in turn meshes with a pinion 20 loosely mounted upon the shaft 11 and secured to a gear i151. The gear A2l meshes with a worm on a. governor shaft`22 which is arranged at right angles to the shafts 'l0 and 11 and supported between arms 23. .33 formed integrally with the frame plate 6. The governor consists of two weighted spring arms 24 and 25 Which as the governor shaft 22 is rotated are caused to throw the weights outwardly against the inner tace of ametal drum 26, the friction of the weights and drum tendingr to retard the movement if the rotating parts and keep them at a co .tant speed.

The specific arrangement of parts Wherehy the current is interrupted to cause impulses to he sent out on the line is as follows: Mounted upon the inner end of the shaft 1l beyond the trame plate 6 is a Wheel 30 havin;r formed on the larger portion of its periphery a plurality ot' teeth 31, 3l which arena" ited to cooperate with spring con tants Elib and fifi to alternately make and k a cir `ait. .lis shownV the wheel 30 provided with a portion 34 which is tree troni teeth. the radius of which is the same as the radius of the wheel at the base of the teeth fli. 5l. ln this space the lower contact spring H22 rests when the mechanism is in its normal position. lust adjacent to one end of the portion 34 is a tooth 35 having a wider tace than the teeth 3l. 31 and it is this tooth which first. passs under the spring con. ict 3L as the wheel 50 starts to rotate, the purpose of this wider face tooth 35 belll' , 'mm pi; iiwhfmiffni herein pin "3;: in mf:

n 1 ing" the time that the svgment 38 ifm .Yhilu ilu um lm; i:`r moving is pnsfiiil mulo." the spring 3L'. The passbf) un mh; miwfl. 1" yi-'vec a Gir-hugh ille spring 22 will stel; the seliectmxt :inwind 13 without affecting the waystation circiits. 'hen the individual transmitters are used each will have its segment adjusted for a single station, the operation however being the Sallie as that previously described. lhe arrangement of the impulse transmitter whereby the gears and pinions constituting principal parts of the clock train are all mounted upon two shafts is of advantage inasmuch as it gives a conpact structure which can be conveniently mounted in a comparatively small space.

I claim:

1. In an impulse transmitter the combination with a rotatable toothed wheel, of contact springs engaged by the teeth otsaid wheel to make and break a circuit. a shaft upon which said toothed wheel is mounted. a segmental plate rotatably mounted upon the end of said shaft adjacent to said toothed wheel the periphery of said plate being flush with the outer ends of teeth on said wheel and a positioning spring secured to said plateand provided on one end with a portion adapted to engage the space bctween two adjacent teeth.

2. In an impulse transmitter the combi nation with a. rotatable toothed wheel and spring contacts engaged thereby for making and breaking a circuit, of a shaft for said toothed wheel, a gear wheel rotatively mounted upon said shaft adjacent to said toothedwheel, a segmental plate secured to said gear wheel adjacent tje-said toothedl wheel, thc curved portion of said segmental plate being flush witlr'the outer ends of teeth on said toothed wheel, a second gear meshing with the gear on the toothed wheel shaft, a shaft for said second gear and a knob for turning' said shaft.

3. In an impulse transmitter the combination with a drivingr shaft and a driven shaft, ot' a. motor spring surrounding said driving shaft. a -gear on said driving shaft, a pinion secured to said driven shaft with which said gear meshes, a gear on said driven shaft adapted to rotate with said pinion, a pinionloosely mounted on said driving shaft with which said' gear on the driven shat't meshes, a gear rotating with said pinion on said driving' shaft, a pinion loosely mounted on said driven shaft with which the loose gear on said driving shaft meshes. a gear mounted to rotate with said loose pinion on said driven shaft, a governor shaft mounted at right angles to said driven shaft and a worm on said governor shaft meshing with said loose gear on said d ri ven shaft.

In \\'itness whereof, I hereuntoA subscribe my nana` this 9th day of July, 1910.

YGRFIORY BROVN.

Witnesses 1 M. IVASHBURN, Jr., G. M. CAMPBELL. 

